18955542 has 16 divisors (see below), whose sum is σ = 39559680. Its totient is φ = 6043752.

The previous prime is 18955529. The next prime is 18955583. The reversal of 18955542 is 24555981.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 18955542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68542 + ... + 68817.

It is an arithmetic number, because the mean of its divisors is an integer number (2472480).

Almost surely, 2^18955542 is an apocalyptic number.

18955542 is an abundant number, since it is smaller than the sum of its proper divisors (20604138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18955542 is a wasteful number, since it uses less digits than its factorization.

18955542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137387.

The product of its digits is 72000, while the sum is 39.

The square root of 18955542 is about 4353.7962745172. The cubic root of 18955542 is about 266.6318763641.

The spelling of 18955542 in words is "eighteen million, nine hundred fifty-five thousand, five hundred forty-two".